Multiple-speed phonograph turntable drive



Aug. l2, 1952 J. D. 'COLE 2,506,451,

MULTIPLE SPEED PHONOGRAPH TURNTABLE DRIVE Filed June 10, 1950 6 Sheets-Shoe?I 1 IN VEN TOR. JA ME 5' D. 001.5

Aug. -12, 1952 J. D. coLE Filed June l0, 1950 MULTIPLE SPEED PHONOGRAPH TURNTABLE DRIVE 6 Sheets-Sheet 2 (57 /0 r lll ilk u) A Y 60 n 55 49 559/. Y g] t 4 62 n 6$ /I,5,' 63 x/ ,l l /f INVENTOR. JAMES D. COLE F/Gi BY oww? Aug. 12, 1952 J. D. coLE 2,606,451

, MULTIPLE SPEED PHONOGRAPH TURNTABLE DRIVE Filed June 10, 1950 6 Sheets-Sheet 3 IN VEN TOR. JAMES D. GOL E' Ffa/3 BY Allg'. 12, 1952 1 D, COLE 2,606,451

MULTIPLE SPEED PHONOGRAPH TURNTABLE DRIVE Filed June 10, 1950 '6 Sheets-Sheet 4 INVENTOR.V JAMES 0. @OLE BY f Aug. 12, 1952 Filed June l0, 1950 J. D. COLE MULTIPLE SPEED PHoNoGRAPH TURNTABLE DRIVE v6 sheets-sheet 5 INVENToR. JAMES D. GOLE Aug. 12, 1952 J. D. coLE 2,606,451

MULTIPLE SPEED PHONOGRAPH TURNTABLE DRIVE Filed June 10, 1950 6 Sheets-Sheet 6 IN VEN TOR. JAMES D. CULE /wW Ma@ speeds.

Patented ug. 12, 1952 UNITED STAT-ES LPAT-ENT MULTIPLE SPE ED PHONOGRAPH .TURNTABLE DRIVE Y.I ames D. Cole, Park l Ridge, Ill.

VApplication. June 10, 1950, lSerial No. 167,299

(Cl. `'it-'199) 21'Claims. l

This invention pertains to..phono'graph-motors, and more particularly to a motor capable of driving a.phonograph turntable vat a plurality of speeds.

In the past, nearly all phonograph records for use in thehome have been produced ifor playing at a single speed (78 R. P. l\/I.). However, with :the advent of records to Abe played` at 331/3 R. P. M.

`and 45 R. P. M.,.it is necessary, in order to-use these records, to have separate drives for each speed. This may be accomplished by several means. For instance, it would be Apossible to .provide amotor which would turn at different However, this type motor `is `very eX- pensive. A ysystem of gears might also be Dossible, but gears` are generally too noisy for use in -aphonograpn I have, however, inventedanew friction type speed changing driveand mechanism particularly adapted for useina phonograph.

lMy invention comprises means drivenby the motor shaftadaptedtobe brought into frictional `driving engagement lwith a rubber tired wheel which, inturn, drives the turntable by frictional engagement therewith. The means driven by the motor `includes driving surfaces of a plurality of-diameters which maybe brought into engagement with the rubber tired wheel either by shifting the driving means or, upon occasion, by shifting the driving wheel. The shifting causes the vwheel to engagea larger or smaller diameter `driving means to change the yspeed of its rotation and, therefore, of the turntable disc on which the records rest.

The details' of my invention, and the invention itself will be made more clear'by referring to the following description and the drawings which `form apart of this'specication.

'In the figures:

Fig. 1 is'a top View of my inventionfrom'just below the surface of the turntable showing Yan embodiment adapted for two speeds;

Fig. 2 is aview similar to Fig. l showing the parts in thealternate position from Fig. 1;

y Fig. 3is aside elevational'view vof the motor 'driveshowing the turntable and base in section;

Fig. 4 isa view similar to Fig. 3 with theparts inthe sameposition'as Fig. 2;

Fig. 5 is a side elevati-onalview of themotor drive .removed "fromits surroundings from the oppositeside from Fig. 3

Fig.'6 is a 4sectionallview to an enlarged scale along line-B ofFig. 1;

Fig. '7 is a detailed sectional view toan-en- .largedscale' alongline '7-1 of Fig.` 1;

Fig. l0 isla View from line .IVO- l0 of'Fig. 56; Fig. 11 -is awsectional Vview alongline. I I--l Lof Fig. l2 vis -a viewto an `enlarged .scale fromline lf2-|201? Fig. 1; Y 'y Fig. 13 is a sectional View along line'l3-l3 of Fig. 3;

Figfl'iis a side elevational view of myli'nvention applied'to athree-s'peed-mot-r'drive;

Fig. 15is a top 4planyiew ofthe three-speed drivein one shiftedipositionwiththe'idler wheel removed; l

Fig. 16 Vis-a'.view :similar -t'o Fig. '.15 vwitl'Vthe shifting parts in another position; l

Fig. 17 vis 'a'lsectional View along :line 'i1-"l1 Iof'Fig. v16 y Fig. 18 is 'asectional "View alongllin'e 'l 3-18 *of Fig. 17 A Fig. 19 is'a side 'elevational'viewifrom 'theside opposite to "F'g. 14 with some parts "brken'lawa'y to show the cam plate more'clearly;and

Fig. 20 is an end'elevationalviewof"the'motor drive of my invention.

`'Briey my invention comprises a'drivemechanismv forthe turntable'of a record-player. -It` in cludes va *motorY of the -usualshaded "pole `induction type ldriving an idler 'pulley Ythrough a shiftable means by fricti-onal engagement, E'the shiftablemeans being adapted to lshif-tfromone Yspeed 4to another by changing 'the tmeans-driving lthe idler. The shiftable `means -compr-ises 'a larger pulley shiftable to @over "or expose a smaller pulley. "The Iidler will be turned L-ajtfdifferent speeds then, dependingfon which-of the two'pulleys is in the plane-tofbeenga'gedlbyfthe idler. These pulleys=are`preferably en a separate "shaftl and drivenaby afbeltfdrive ffrorn' the motor.

'll/[ore --specically and Iit/ith vreference to the drawings, myi deviceinludesa motor whichimay be similar to that described lin 'my Ucopen'ding application, Ser. o. J80,549, "iile'March 9. 15949,

now abandoned. 'This-motorjeomprises afstator including-a'winding'l-l and polepieces l2. -`Support legs whcnmay bel cas-t integral withthepoie pieces |2 or `fixed theretoby rivets 'Mextending Yupwardly `from Ithe pole "piece `Aand then "at right angles thereto to provide for mounting the motor. Rubber. grommets I 5 -inserted into holes Vin these'legs providea vibratifonjand noiseinsulator between'thelmotor and thebase pla'tel' 0f the .record changer' in which my "drive A"may be used. The base plate I6 is formed in somewhat dished shape so that the turntable |1, which is supported thereon by any customary means, may be set down in the hollow somewhat. The rotor I9 of the motor is journalled on a shaft 23 which is supported on the motor by an upper bracket 2| and lower bracket 22. A pulley 23 is pressed into the rotor I3 and turned thereby. The construction of the motor is more completely described in my aforesaid copending application.

In order to accomplish my drive, I provide an idler shaft 24 (Figs. 7 and 8) on which is journalled the shiftable means. This shaft is 4supported on an offset step part 28 of the support bracket 21 which also carries one of the support legs I3 (Fig. 5).

The drive from the pulley 23 on the motor to the turntable is through a wide belt 28 to a pulley 29 on the shiftable means. This pulley has a long hub 30 (Figs. 7 and 8) extending upward and terminating in a small driving rotor 3|. The pulley 29 may be conveniently held on the shaft 24 by a star washer 32 resting on a felt washer 33 which serves as a thrust bearing. The star washer 32 is kept from upward movement by a ring 34 engaged in a groove 35 in the shaft. The pulley 29 is held in place by the engagement of the arms or points of the star washer with an internal counter bore 35 on the pulley.

Surrounding the hub 33 and slidably journalled thereon is a larger driving rotor 31 which is adapted to be shifted vertic-ally on the hub 3U. The larger rotor 31 is driven by the hub 30 through a pair of balls 38 disposed in drilled holes in the lower part of the rotor, and which are held therein by a spring steel ring 43 disposed in a groove 4| around the hub. These balls 38 are engaged in longitudinal keyways 42 in the hub 30 of the pulley so that they can roll longitudinally of the hub but serve as keys to drive the larger rotor 31 rotatively. A pair of dimples 43 at the upper ends of the keyways 42 serve as detents in which the balls are engaged when the rotor 31 is shifted to its upper position. A fiber plate 44 fixed on the lower part of the larger rotor 31 provides an edge which may be engaged by the shifting fork 45 as hereinafter described. This plate is held in place by a spring wire clip 46 engaged in a groove in the rotor 31.

The drive from the rotors to the turntable I1 is accomplished by the usual means including a rubber tired idler wheel 41 supported by a post 48 on a sliding arm 43. The sliding arm 43 is slidably disposed on a support arm 53 which is pivoted by its hub BI to the same support bracket 21 which supports the idler shaft 24 (Fig. The wheel 41 is urged into engagement with the turntable I1 and the driving rotor 3| by a spring 53 engaged between a depending finger 54 on the sliding arm 49 and the upper bracket 2| which supports the motor shaft and is more fully described hereinafter.

The sliding arm 49 is provided with raised ways 51 which engage the support arm 50 on its under side and provide easier sliding. Two slots 58 and 59 are also provided to allow the arm to slide. The rst of the slots 58 surrounds a necked-down portion 68 of the hub 3| of Ythe support arm 50 (Fig. 6). The other slot 59 embraces a depending T-shaped flange 62, the cross piece of which serves to support the sliding arm 49 in its proper position (Fig. 11). The hub 6| is xed to the support arm 5i) and pro- 4 vides a bearing for it on the post 63 which is mounted on the support bracket 21, and also serves to locate the wheel 41 properly to engage the rotor 3|.

The shifting means for the larger rotor 31 comprises primarily a shifting fork 45 and a sliding cam means 65. The shifting fork comprises a stiff wire bent at its midsection to embrace a pin G6 fixed to an ear 61 on the support bracket 21. The ends of the wire are bent horizontally, forming branches or fingers 18 and 8| extending one on each side of the fiber disc 44 on the larger rotor 31.

The cam plate 55 contains a slot 68 which embraces the pin 66 and is held thereon by the head 69 of the pin 65 (Fig. 13). The other end of the cam plate is supported by a second slot 1| which is slidably disposed about the upper support plate 2|. Lateral movement of the cam plate 35 is prevented by a struck down lip 12 (Fig. l2) which, with a post 13 on the motor pole piece I2, provides an opening in which the cam plate may slide. This post 13 along with a similar post 13 support the plate 2| which is fastened thereto by screws 14. Thus, it is apparent that the cam plate 65 may slide in a horizontal direction between limits set by the extent of the slots 58 and 1|.

In order that this motion may be effective to shift the larger rotor 31 up to the position where it will be engaged by the wheel 41, a cam slot 16 is provided through which the ends of the shifting fork 45 pass to embrace the plate 44. It is apparent that the cam is therefore effective to guide the shifting fork. Thus when the cam plate 65 is moved from the position of Fig. 3 to that of Fig. 4, the lower branch 18 of the fork is guided by the surface 19 in an upward direction carrying the large rotor 31 upward to its top position where the balls 38 engage the detents 43. Then, when the cam moves beyond that, the surface drops away slightly so that the fork is disengaged from the fiber plate and the rotor is completely free to rotate. To lower the rotor 31, the procedure is exactly reversed with the top branch 8| of the fork being guided by the upper surface B2 of the slot 15 and, therefore, moving the rotor downward.

A means for moving the idler wheel 41 out of engagement with the small rotor 3| While the larger rotor 31 is shifted into its upper position is provided as best shown in Figs. l, 2 and 10. A strip B4 of flat spring steel is formed approximately as shown and is fastened to the cam plate 65 by a rivet 85. From the rivet it extends away from the cam 65 in a rising portion ending in a latch formation 81. It is apparent that in moving from the position of Fig. l to that of Fig. 2, the strip 84 will be carried to the right by the cam plate 35. As it moves, the latch 81 will engage the cross piece of the flange 62 and carry it to the right, thus disengaging the wheel 41 from the rotor 3|. As the cam continues in its movement and raises the larger rotor 31, the flange 62 is carried in an arcuate path away from the cam plate 65 and finally is released from the latch 81. The spring 53 is then effective to pull the wheel 41 back into frictional driven engagement with the larger rotor 31 (Fig. 2) which has been shifted upward by the action of the cam surface 19 on the lower finger 18 of the shifting fork as previously described.

The shifting of the cam plate 65 is accomplished by a lever 88 pivoted on a post 89. A

:gettati -"be`st shown `in Figs. 14 to 20. The motor used in this device is similar to that used inthe prior described embodiment and similar reference characters are used for the similar parts.

An -idler shaft 95 somewhat similar tto that of 'the two-speed embodiment is fixed to the-motor pole piece I2 anda bracket 96 which, in turn,

Hmay be fixed to the pole piece by screws or rivets '91. fand is driven similarly to that previously described. The hub, however, is stepped, having two A pulley 98 is journalled on this shaft 95 different driving diameters separated by a fairly wide chamfered section |00. These diameters `vare of such size that when the idler wheel 41 engages the smaller diameter the turntable will be driven at a low speed, preferably 331/3 R. P. M.,

and when the idler wheel engages the larger divaineter |02 the turntable speed will be preferably flR. P.`M. A rotor |03 is sldably journalled on 1the larger driving `diameter |02 and a hub `|04 having a third diameter in a manner similar 4to that `previously described save that in place f the balls -38 and ring 40, the wire clip |05 `(F`g. 18) which holds the fiber washer |05 in place on the rotor |03 is formed with a detent |01 vo'n'one end. This detent extends through a hole |08 in the rotor and into a groove |09 similar to that previously described. It is obvious thatv *either type of detent (the wire clip just described,

or the ball type), could be used in either configuration. A felt washer 33 may be provided similar to that in the previous embodiment, supported by a washer 0 on a shoulder ||5 on the 'Shaft 95.

The shifting is accomplished by substantially similar means in both embodiments. In the three *speed drive, the cam plate is mounted on a bracket |2 by means of a screw ||'3. A slot ||4 inthe cam plate is disposed about the screw ||3 V:and is held thereon by its head. Additional support 'for the plate is provided at the other fend thereof by achannel |1 formed in the motor shaft supporting bracket 2| at the lower edge of fthe plate and a channel formed in the :idler `shaft supporting bracket 96 at the upper edge. Thus, it is apparent vthat the plate is 'free'toslide within limits defined by the extent of the slot ||'4. VTheplate in the three speed drive hastwo cam surfaces instead of the single slot 16.

The, first cam surface is similar to that described in connection with the two speed drive and comprises 'a slot |20 through which extends This fork is in all respects fastened to a'bracket |22 on the motor, by a rivet |23. The slot |20 is formed with a rising portion |24 which is effective to cause the fork |2| to shiftthe rotor 96 from its lower to its upper `-positionand a dwell portion |25 which accommodates thefork |2| while'the idler wheel 41 is ybeing shifted as described hereinafter.

I Dimpled portions |26 are provided torelease the washer `:|00 from pressure of the fork`|2| andto provide .detent meansiforthe' camplate.

:The lsecond cam :surface io'n fthe Scam plate lfls spring 'the-'wire from coming loose.

6 effective -tofshi'ft the idler wheel 41. The wheel,

Vin order to k-be shiftablejfis mounted'somewhat differently Athan'in previously described embodiment. The-sliding'arm 49 which carries the post '-48 on which the idler wheel 41 is journalled, and the support arm 50 may be the same as above described. However, the support 50 instead of beling merely pivoted to its bracket 21 is rotatably and slidably `journalled ina bearing |28 on the bracket-21 by a sliding shaft |29 (Figs. 14 and 119).' Atthe other end of the shaft is a washer |30 held thereon by some means, preferably a split washer |3|. `Between the washer |30 and the Lbijacket 21, I provide a spring |32 which .urges the shaft |29 and. therefore, the wheel 41, which 'is indirectly carried by the shaft, in a 'downward direction.

The actual 'shifting of the idler wheel 41 "is accomplished by the action of the cam surface |33 on the Vfollower' surface |34 of the shaft |29. This cam surface |33 is formed t0 provide va shifting of the idler `41 while the rotor |03 is not being shifted. Thus, the rise portion |33 ofthe cam surface extends over that portion oftravel of the cam plate where the fork |2| is in the dwell portion |25 of the cam slot |20.

The three speeds are accomplished, then, as follows: The motor 'and pulley 98 turn at constant speed. When the cam plate is at its furthest position to the left in Fig. 19, the shifting fork |2| vis at its lower position, and the :idler wheel 41 is raised and, therefore, is in position to contact the smaller diameter I0| ofthe hub. The peripheral speed of this diameter is such that the turntable rotates at 331/3 R. P. M.

:If vthe cam plate is then shifted to its ymidgaged by the idler `wheel41 and the turntable will then be driven 'at r18.26 R. P. M. The shifting lever 88 pivoted on the post 09 is substantially similar to that previously described and its operation is exactly similar.

It is not necessary, in this embodiment to disengage the wheel41 from the smaller diameter '|0| of the hub in shifting from'33 1A; to 45 R. P. M., since in the shifting process, the wheel rolls up the broad chamfer |00 as the motor runs, and if 4the shifting is done with the motor stopped, the |32 urges the idler 41 downward into Aproper engagement soon after the motor is started. However, in shifting from the larger diameter |02 of the hub to the rotor |03, i. e., from 45 R. P. M. to -78 R. P. M., it is necessary to move the idler 41 away so that the rotor |03 may in the two speed motor'previously described, but

I haveV shown an alternative means in Figs. 15, 16 and 19.

This disengaging means comprises a stiff wire |35 whichis pivotally fixed to the shifting lever "8 0 preferably merely by extending through a hole in the lever and being bent over at |38 to prevent Atthe other end lthe wire I|35` extendsthrougha slotted hole |39 vin ari-ear |40 struck upwardly from the sliding armi49. -'NearthsY` endl the wire -islbent 'inastep formation at IM.I which is adaped to engage the ear |43 when the shifting lever 88 is moved from the 45 R. P. M. position. En order to ensure the proper engagement, a light spring |43 urges the wire |36 in the direction so that the stepped formation |42 will engage the ear |46. This engagement designedly takes place just as the shifting lever 88 is moved past the 45 R. P. M position and continues until the lever is in the 78 R. P. M. position. At this point, however, the motion has been such that the idler wheel 4l does not quite completely clear the rotor |03 as it is moving upward. Therefore, a chamfer M5 is provided on the rotor |03, up which the idler 4l rolls to complete the shifting and to disengage the wire |36 from the ear so that there will be proper frictional engagement between the idler 4l and the rotor |33 and turntable to drive the turntable. Y

It is conceived that a fourth different speed might be vprovided by a shiftable rotor on the smaller diameter |ll| of the hub; adapted to shift upward out of contact with the idler. However, since thus far there are only three common recording speeds, the fourth speed is not necessary nor even desirable.

It is thus apparent that I have provided a motor drive for a phonograph turntable capable of driving the turntable at any of several rotative speeds merely by a shifting of a lever.

Having thus described my invention, I am aware that numerous and extensive departures. may be made therefrom without departing from the spirit or scope of my invention.

I claim:

1. A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, and an idler wheel in frictional engagement with said turntable and either said pulley means or said shiftable means depending on the position of said shiftable means, said idler wheel being thereby adapted to drive said turntable at a plurality of speeds.

2. A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axialiy thereon, and an idler wheel in frietional engagement with said turntable and either said pulley means or said shiftable means depending on the position of said shiftable means, said idler wheel being thereby adapted to drive said turntable at a plurality of speeds, a disk on said shiftable means extending beyond the periphery thereof, fork means embracing said disk and cam means adapted to cause said fork means to shift said shiftable mea-ns.

3. A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in driven relationship with said motor, shiftable means en said pulley means adapted to be shifted axially thereon, and an idler wheel in frictional engagement with said turntable and either said pulley means or said shiftab-le means depending on the position of said shiftable means, said idler wheel being thereby adapted to drive said turntable at a plurality of speeds, a disk on said shiftablemeans extending beyond the periphery thereof, fork means embracing said disk and cam means adapted to cause said fork means to shift said shiftable means, said cam means comprising a plate slidably mounted on said motor and 8 formed with a cam slot therein through which said fork means extends. Y

4. A multi-speed drive for a phonograph turntable comprising a motor. idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, and an idler wheel in frictional engagement with said turntable and either said pulley means or said shiftable means depending on the position of said shiftable means, said idler wheel being thereby adapted to drive said turntable at a plurality of speeds, a disk on said shiftable means extending beyond the periphery thereof, fork means embracing said disk and cam means adapted to cause said fork means to shift said shiftable means, said cam means comprising a plate slidably mounted on said motor and formed with a cam slot therein through which said fork means extends, and means on said plate adapted to disengage said idler wheel from said frictional engagement While said shiftable means is being shifted into position to be engaged thereby.

5. A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, and an idler wheel in frictional engagement with said turntable and either said pulley means or said shiftable means depending on the position of said shiftable means, said idler wheel lbeing thereby adapted to drive said turntable at a plurality of speeds, a disk on said shitable means extending beyond the periphery thereof, fork means embracing said disk, and cam means adapted to cause said fork means to shift said shiftable means, said 'cam means comprising a plate slidably mounted on said motor and formed with a cam slot therein through which said fork means extends, and lever means pivoted on said motor adapted to shift said plate. y

6. A multi-speed drive for a phonograph turntable comp-rising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, an idler wheel in frictional engagement with said turntable adapted to be driven by either said shiftable means or said pulley means dependent on the position of said shiftable means, said idler wheel being pivoted on a shiftable mount on said motor and adapted to be shifted t0 engage either of a plurality of diameters on said pulley means.

7. A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, an idler wheel in frictional engagement with said turntable adapted to be driven by either said shiftable means or said pulley means dependent on the position of said shiftable means, said idler wheel being pivoted on a shiftable mount on said motor and adapted to be shifted to engage either of a plurality of diameters on said pulley means, and means adapted to shift said shiftahle means and said idler wheel mounting.

8. A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, an idler wheel in frictional engagement with said turntable adapted to be driven by either said shiftable means or said pulley means dependent on the position of said shiftable means, said idlerv wheel being pivoted on a shiftable mount on said motor and adapted tobe shifted to engage either of a plurality of diameters on said pulley means, a disk on said shiftable means extending beyond the periphery thereof, fork means embracing said disk, andl cam. means engagingsaid fork to cause it to shift said shiftable means.

9i A multi-speed drive for a phonograph turntable comprising a motor, idler pulley means in4` driven relationship with said motor, shiftablemeans on said pulley means adapted to be shifted axially thereon, an idler wheel in frictional engagement with said turntable adapted to be driven by either said shiftable meansy or said pulley means dependent on the position of said shiftablemeans, said idler wheel being pivoted' on a` shiftable. mount on said motor andv adapted to; be shifted'to engageeither of a plurality of diameters on said pulley means, a cam plate slidably mounted on. said motor formed with cam surfaces:adaptedI to engage said shiftable'mountv to .shift'said vidler wheel.

10. Al multi-speed drive. for' a phonograph turntablecomp-rising a motor, idler pulley means in driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, an idler wheel in frictional engagement with said turntable adapted tofbe driven by either said shiftable means or said pulleymeans dependent on the position of said shiftable means, said idler wheel being pivoted on ashiftable'mount on said motor and adapted to. be shifted to engage either of a plurality of diameters on said pulley means, a disk on said shiftable means extending beyond thevperiphery thereof; fork means embracing said disk, and cam means engaging said fork to cause it to shift said shiftable means, comprising a cam plate slidably mounted on said motor formed with a cam slot therein through which said fork extends.

11; Amulti-speed drive for a phonographturntable comprising a motor, idler pulley means inV driven relationship with said motor, shiftable means on said pulley means adapted to be shifted axially thereon, an idler wheel in frictional engagement with said turntable adapted to be driven' by either said shiftable means or sai-d pulley means dependent on the position of said shiftable means, said idler wheel being pivoted on a shiftab'le mount on said motor and adapted tor be shifted to engage either of a plurality of diameters `on said pulley means, aV disk on said shiftable l means exten-ding beyond the periphery thereof; forkfmeans embracing said disk, and cam means engagingsaid fork to cause it to shift said shiftable means, comprising'a cam plate slidably mounted on said motor formed with a cam slot therein through which said fork extends, said plate also having cam surfaces adapted to engage said shiftable mount to shift said, idler wheel.

12; Amulti-speed drive for a phonograph turntable comprising a motor having a driving pulley, an'idl'er shaft mounted on said motor, an idler pulley on ,saidV shaft, belt means between said driving pulley andA said idler pulley to drive said idler pulley, a hub in extension from saididler pulley, a rotorv adapted to rotate with said hub and shiftable longitudinally thereof, said hub in extension beyond said rotor, an idler wheelv adapted to engage said hub or said rotor dependent on the shiftedposition of said rotor, and said turntable frictionally to drive said turntable.

13. A'multispeed drive'forV a phonograph turntable comprising a motor having-a driving pulley, an idler shaft mounted on said motor, an idler pulley on said shaft, belt means between said driving pulleyv and said idler pulley to drive said idler pulley, a hub in extension from said idler. pulley, a rotor adapted to rotate with said, hub and shiftable longitudinally thereof, said hub normally extending beyond said ro-tor, an` idler Wheel adapted to engage said hub or said rotor dependent on the shifted position of said rotor, and said turntable frictionally to drive said.` turntable, and means mounted on said motor, to. shift said rotor into and out of engagementzwith said wheel;

14. A multispeed drive for a phonograph turn@-A table comprising a motor, idler meansl mounted on said motor adapted to `be driven thereby; said, idler means being formed with a plurality of diameters, an idler wheel shiftably mounted oni said motor adapted to be shifted to engageanyl of said plurality of diameters and saidturntable to drive said'turntable at a plurality of-rotative,`

speeds.

15. The combination with a continuouslydriv-len pulley andv a mobile idler'wheel adapted to 'beiV drivingly associated with the dep-ending angefof. a conventional phonograph turntable, of .mechas nism' for selectively driving the turntable at one of a plurality of speeds from the pulley, saidY mechanism comprising a plurality of driverele-V ments in driving communication with said pulley;` one ofthe elements being in coaxial relationship: to the other element, a pivoted fork element, carni means in association with said elements, meansiinz connection with said cam means to selectivelyf' move said cam meansY to one of a plurality of: predetermined positions, said cam means being adapted to swing said pivoted fork element as: said cam means is moved, annular disk'meansz. in connection with one of said driver elements', said disk means being cooperatively associated with said pivoted element by which said driveri element is adapted to be moved to a plurality; of predetermined positions with respect to the. other of the driver elements, and resilient means coupled to the mobile idler Wheel to drivinglyassociate said wheel'with said last named driver." element when it is in one of its predetermined positions and when itis in another of its pre determined positions providing for driving'eegagement of the other of said driver'elements: with saidwheel, said resilientA means alsoprofviding for concurrent drivingcommunicationbeitween said wheelv and said turntable when drivi ingly associated with either of saidV driver elements.

16. The combination with a continuouslyf driven pulley and a mobile idler wheel adapted'to be drivingly associated with the dependingange of a conventional phonograph turntable, ofA` mechanism for selectively driving the turntable at one of a plurality of'speeds from the' pulley;

said mechanism comprising first and second"V driver elements in driving communication with= said pulley, said driver elements being in coaxial relationship with each other, a pivoted fork- 'ele ment, a pair of fingers extending toward said. driver elements from said fork element, a longi tudinally slidable member in associationr withl said elements, manual lever means to move said@ member selectively to oneof a plurality of 'predetermined positions, cam surfaces on said longitudinally slidable member adapted to swing said' fork element as said slidable member is moved',

. an annular'disk memberon thegsecond driver-j f element, said disk member extending between said ngers to provide a plurality of positions for said second driver element with respect to the rst of the driver elements, means coupled to the mobile idler wheel to associate said wheel drivingly with said second driver element when it is in one of its predetermined positions and, when it is in another of its predetermined positions, providing for driving engagement of the rst of said driver elements with said wheel, said resilient means also providing for concurrent driving communication between said Wheel and said turntable when drivingly associated with either of said driver elements, and means in connection with said longitudinally movable member to move said wheel out of engagement with one of said driver elements as said longitudinally movable member is moved to provide for shifting of said second element with respect to said rst driver element.

'17. The combination with a constant speed motor having a motor pulley in connection therewith and bracket portions thereon, one of which being for support of a mobile idler wheel adapted to be drivingly associated with the depending peripheral flange of a conventional phonograph turntable, of mechanism for selectively driving the turntable at one of a plurality of speeds from the motor pulley, said mechanism comprising an idler pulley adapted to rotate about an axis in fixed relationship to one of said bracket portions, means to drivingly couple said idler pulley to said motor pulley, a first driver element in driving communication with said idler pulley, a second driver element in driving communication with said first driver element, an annular disk portion on said second driver element, a bifurcated element having a pair of nger portions at one end thereof adapted to straddle said disk portion, pivot means to anchor said bifurcated element pivotally at the other end thereof to one of the bracket portions, cam means slidably anchored by said pivot means, manual lever means coupled to said cam means by which said cam means is adapted to be moved to selectively shift said second driver element between a plurality of predetermined positions, means to provide concurrent driving relationship between said mobile idler wheel and said turntable and said second driver element when in one position and between said mobile idler wheel and said rst driver element when said second driver element is in its other position, and means in connection with said cam means adapted to remove said mobile idler wheel from engagement with either of said driver elements while said second driver element is being moved from one to another of its positions.

18. In a phonograph record player of the class in which a constant speed motor having a motor pulley and bracket portions in connection therewith, one of the portions being for support of a mobile idler wheel adapted to drive a conventional phonograph turntable through its depending peripheral ange, the idler wheel being supported at one end of one of a pair of carrier members one of which is slidably anchored to a pivot for the other of the members, which other member includes a guide portion, in combination, mechanism for selectively driving the mobile idler at a plurality of speeds from the motor pulley, said mechanism comprising an idler pulley adapted to rotate about an axis in xed relationship to a second of the bracket portions, means to couple said second idler drivingly to the motor pulley, a first driver element on said idler pulley and in axial extension therefrom, means in coupled relationship to said idler wheel to bias said wheel into driving relationship with said first driver element thereby providing one speed for said idler wheel, a second driver element slidably keyed to said rst driver element, means including a longitudinally movable cam plate beside said driver element by which said second driver element is drivingly engaged by said idler wheel to provide another speed therefor, said cam plate having a slot at either end thereof, means including a headed pin on one of said bracket portions in extension through one of said slots, a support plate fastened to another of said bracket portions and in, engagement with the other of the slots, said pin and said support plate being adapted to confine said cam plate against displacement thereof in a direction parallel to the axis of said rst and second driver elements but providing for movement of the cam plate transversely of said axis, said cam plate also having a cam slot extending obliquely and centrally thereof, spaced apart cam surfaces provided by said cam slot, a bifurcated element adapted to swing about said headed pin, said bifurcated element including a pair of resilient arms, a pair of fingers at the free ends of said arms and in extension through said cam slot toward said driver elements, said fingers being resiliently deflected toward each other by said cam surfaces, manual lever means including a resilient arm 'adapted to be pressed into engagement with said cam plate by which said cam plate is adapted to be moved to move said ngers substantially transversely of said cam plate, a iiange peripherally of said second driver element, said flange extending between the fingers, and an extension on said cam plate adapted to engage the guide portion of one of said carrier plates t0 remove the idler wheel from driving engagement with one of said driver elements while the second of the driver elements is being shifted.

19. A multi-speed drive for a phonograph turntable comprising a frame; a motor mounted on said frame; idler pulley means in driven relationship to said motor comprising a driven pulley having an elongated hub, said hub being formed with two driving portions of different diameters axially spaced apart, shiftable driving means adapted to be driven by said hub and shiftable axially between two positions thereon; sliding arm means shiftingly mounted on said frame, an idler wheel journalled on said arm means adapted to be driven by said idler pulley means and engaging said turntable to drive it; and means to shift said shiftable driving means and said arm means comprising a cam plate slidably mounted in said frame and having two cam surfaces, the first of said cam surfaces engaging said arm means to shift said idler wheel from engagement with one of said driving portions to the second driving portion, a flange carried by said shiftable driving means, fork means pivotallv mounted on said frame straddling said ange, the second of said cam surfaces adapted to move said fork to cause said shiftable driving means to be shifted between its two positions.

20. A multi-speed drive for a phonograph turntable comprising a frame; a motor mounted on said frame; idler pulley means in driven relationship to said motor comprising a driven pulley pulley having an elongated hub, said hub being formed with two driving portions of different diameters axially spaced apart, shiftable driving means adapted to be driven by said hub and shiftable axially between two positions thereon; sliding arm means shiftingly mounted on said frame; an idler wheel journalled on said arm means adapted to be driven by said idler pulley means and engaging said turntable to drive it; and means to shift said shiftable driving means and said arm means comprising a cam plate slidably mounted in said frame and having two cam surfaces, the rst of said cam surfaces engaging said arm means to shift said idler wheel from engagement with one of said driving portions to the second driving portion, a ange carried by said shiftable drivingmeans, fork means pivotally mounted on said frame straddling said flange, the second of said cam surfaces adapted to move said fork to cause said shiftable driving means to be shifted between its two positions, said cam surfaces being arranged so that said shiftable driving means is shifted While said idler wheel is at a dwell portion of said first cam and that said idler wheel is shifted While said fork means is at a dwell portion of said second cam.

21. A multi-speed drive for a phonograph turntable comprising a frame; a motor mounted on said frame; idler pulley means in driven relationship to said motor comprising a driven pulley having an elongated hub, said hub being formed with two driving portions of different diameters axially spaced apart, shiftable driving means adapted to be driven by said hub and shiftable axially between two positions thereon; sliding arm means shiftingly mounted on said frame; an idler wheel journalled on said arm means adapted to be driven by said idler pulley means and engaging said turntable to drive it; and means to shift said shiftable driving means and said arm means comprising a cam plate slidably mounted in said frame and having two cam surfaces, the rst of said cam surfaces engaging said arm means to shift said idler wheel from engagement with one of said driving portions to the second driving portion, a iiange carried by said shiftable driving means, fork means pivotally mounted on said frame straddling said flange, the second of said cam surfaces adapted to move said fork to cause said shiftable driving means to be shifted between its two positions, lever means pivotally mounted on said frame and engaging said cam plate to move it; and disengagement means pivoted to said lever means and formed with a step adapted to engage said sliding arm means to disengage said idler wheel from said idler pulley means while said shiftable driving means is shifted.

JAMES D. COLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 904,723 Reeves Nov. 24, 1908 1,070,890 Heylman Aug. 19, 1913 1,320,519 Ahearn Nov. 4, 1919 2,381,079 Pittman Aug. 7, 1945 2,478,538 Leitner Aug. 9, 1949 

